THE HACKER ATTITUDE

A computer virus is a computer program that has ability to entering to computer, storing itself and infects a computer without the permission or knowledge of the owner.

Macro viruses infect files that are created using certain applications or programs that contain macros. These mini-programs make it possible to automate series of operations so that they are performed as a single action, thereby saving the user from having to carry them out one by one.

These trojans open port 21 on your computer letting everyone having a FTP client to connect to your computer without password with full upload and download options.

Short for malicious is software designed to infiltrate a computer without the owner's informed consent.

A worm is a program very similar to a virus, it has the ability to self-replicate, and can lead to negative effects on your system and most importantly they are detected and eliminated by anti-viruses.

They are not considered viruses because they do not replicate. They are not even programs in their own right but rather camouflaged segments of other programs.
Their objective is to destroy data on the computer once certain conditions have been met. Logic bombs go undetected until launched, and the results can be destructive.

E-mail spam, known as unsolicited bulk Email, junk mail, or unsolicited commercial email, is the practice of sending unwanted e-mail messages, frequently with commercial content, in large quantities to an indiscriminate set of recipients.

Spyware is a type of malware that is installed on computers without the permission or knowledge of the owner and that collects information about users without their knowledge. The presence of spyware is typically hidden from the user.
While the term spyware suggests software that secretly monitors the user's behavior, the functions of spyware extend well beyond simple monitoring. Spyware programs can collect various types of personal information, such as Internet surfing habits and sites that have been visited, but can also interfere with user control of the computer in other ways, such as installing additional software and redirecting Web browser activity. Spyware is known to change computer settings, resulting in slow connection speeds, different home pages, and/or loss of Internet or functionality of other programs.

Password Sniffer can listen on LAN and enables network administrators or parents to capture passwords of any network user. Currently, Password Sniffer can monitor and capture passwords through FTP, POP3, HTTP, SMTP, Telnet, and etc.